I'm afraid that I disagree with the 'not evil because they're not human' part.
If I said that, for instance, General Grievous from Star Wars was evil, would that be anthropormophisation? No, it wouldn't, as he appears to be sentient.
The Nomads appear to be intelligent enough to be considered evil, especially when they allegedly destroyed Sol without provocation, unless one is applying a particular religious doctrine which states that only humans or similar have souls.
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